How can I remove the Atlassian logo from dashboard?

I'm currently working on a custom dashboard for our documentation project. The dashboard has a big Atlassian logo and link that I would like to remove because our customers might be confused about our company being associated with Atlassian.

I am aware that our license agreement requires our footer to say something along the lines of "Powered by Atlassian" and we are okay with that. But the big Atlassian logo needs to go.

image2015-4-9 11:50:56.png

Also, this logo does not appear to be part of the footer.vm file. Below is an extract from that file.